首先请注意，我是 Python 的初学者。参加当前在 ArcGIS 环境中处理 Python 的类(class)。我当前的项目是一个创建文件并将其他文件复制到其中的简单程序。然而，作业的一部分是让打印语句说明正在发生的事情，例如最终的打印语句应该如下所示:
正在处理多边形要素类....
处理要素类 >> 建筑物
字段信息:
etc.
这是我应该执行的一小段代码:
pointlist = arcpy.ListFeatureClasses("*", "Point")
print "Processing Point FeatureClasses..."
for pl in pointlist:
arcpy.MakeFeatureLayer_management(pl, "Point" + 1)
pointlayer = arcpy.SelectLayerByLocation_management(pl, "intersect", MapGridID)
pointcount = int(arcpy.GetCount_management(pointlayer).getOutput(0))
if pointcount >= 1:
arcpy.CopyFeatures_management(pointlayer, OutputGDB)
for pl in pointlist:
print "Processing FeatureClass:" + pl
pointfield = arcpy.ListFields()
for pf in pointfield:
print "Field Name:" + pf
出现的问题是它打印了第一个打印语句“Processing Point FeatureClasses”，但不执行其余部分，然后跳到我的代码的下一部分并执行它。知道为什么吗？抱歉，如果我的格式或措辞不正确/听起来很奇怪。谢谢。
编辑
我也给我的教授发了邮件寻求一些指导，他回信了我上面代码块的一个稍微编辑过的版本。我现在可以打印除点场打印语句之外的所有内容，这些语句现在被跳过了。这是代码:
pointlist = arcpy.ListFeatureClasses("*", "Point")
print "Processing Point FeatureClasses...\n"
i = 1
for pl in pointlist:
print "Processing FeatureClass: " + pl
featlayernamepoint = "Point" + str(i)
arcpy.MakeFeatureLayer_management(pl, featlayernamepoint)
arcpy.SelectLayerByLocation_management(featlayernamepoint, "intersect", featurelayerMG2)
pointcount = int(arcpy.GetCount_management(featlayernamepoint).getOutput(0))
if pointcount >= 1:
arcpy.CopyFeatures_management(featlayernamepoint, OutputGDB)
pointfield = arcpy.ListFields(featlayernamepoint)
for pf in pointfield:
print "Field Name: " + pf.name
i += 1
请您参考如下方法:
您忘记将点传递给 ListFields()
pointfield = arcpy.ListFields(pl)
for pf in pointfield:
print "Field Name:" + pf.name
